EP 0217599 B1 19920212 - BRUSHLESS MOTOR DRIVE CIRCUITS
Title (en)
BRUSHLESS MOTOR DRIVE CIRCUITS
Publication
Application
Priority
JP 20814885 A 19850920
Abstract (en)
[origin: EP0217599A2] A brushless motor drive circuit includes a plurality of Hall elements (1) for detecting magnetic flux changes of a rotating rotor magnet A drive signal generating circuit (6, 7, 12, 13, 20, 21) generates drive signals applied to the stator windings (L) of the motor. The waveform of each of the drive signals has a pair of slanted edge portions and a relatively flat portion interposed between the slanted edge portions which are directly formed from said detected flux changes.
IPC 1-7
IPC 8 full level
H02P 6/04 (2016.01); H02P 6/06 (2006.01); H02P 6/08 (2016.01); H02P 6/12 (2006.01); H02P 6/14 (2006.01)
CPC (source: EP KR US)
H02P 6/04 (2013.01 - KR); H02P 6/14 (2013.01 - EP US); H02P 2209/07 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB
DOCDB simple family (publication)
EP 0217599 A2 19870408; EP 0217599 A3 19880330; EP 0217599 B1 19920212; AT E72614 T1 19920215; CA 1292036 C 19911112; CN 1005890 B 19891122; CN 86106600 A 19870318; DE 3683886 D1 19920326; JP H0736713 B2 19950419; JP S6271485 A 19870402; KR 870003604 A 19870418; KR 940009965 B1 19941019; US 4760315 A 19880726
DOCDB simple family (application)
EP 86307191 A 19860918; AT 86307191 T 19860918; CA 518165 A 19860915; CN 86106600 A 19860920; DE 3683886 T 19860918; JP 20814885 A 19850920; KR 860007776 A 19860916; US 90650286 A 19860912